Pump



Jan. 10, 1939. E. J. RUTHMAN PUMP 2 Sheets-Sheet l 7 Filed Sept. 11, 1936 v INVENTORV Eownao J. RUTH/"AM Jan. 10, 1939. E. J. RUTHMAN PUMP Filed Sept. 11, 1956 2 Sheets-Sheet 2 1N VENTOR. [own/20 -J. RUTH/VAN WW WWW ATTORNEYS Patented Jan. 10, 1939 UNITED STATES PATENT OFFICE PUMP . Edward J'. Ruthman, Cincinnati, Ohio Application September 11, 1936, Serial No. 100,343

2 Claims.

This invention relates to improvements in a circulating pump such as is used for circulatin lubricant, cooling medium, cutting compound, and the like, relative to a machine tool.

One of the principal objects of the present invention is the provision of a circulating pump in which the pump housing is so arranged as to be conveniently attached to a tank, or a machine tool or the like and in which the discharge pipe may be arranged within the tank, machine tool or the like.

Another object of this invention is the provision of a circulating pump in which the intake and exhaust are arranged in close proximity to one another, whereby the pump, as a whole may be mounted so as to utilize the least invention. should be readily apparent by reference to the following specification considered in conjunction with the accompanying drawings forming apart thereof and it is to be understood that any modifications may be made in the exact structural details there shown and described, within the scope of the appended claims, without departing from or exceeding the spirit of the invention.

In the drawings:

Fig. 1 is a vertical sectional view through a self contained circulating pump showing this invention.

Fig. 2 is a horizontal sectional view taken on line 2-2 of Figure 1.

Fig. 3 is a horizontal'sectional view through the pump housing and taken on line 33 of Figure 1.

Fig. 4 is a fragmentary sectional view through the lower part of the mechanism of Fig. 1 and includes a portion of a tank or machine tool base and illustrates a modification of the construction of the pump housing.

Fig. 5 is a vertical sectional view illustrating the passage through the pump body taken on line 55 of Fig. 4.

Fig. 6 is a vertical sectional view through the lower end of Fig. 1 and illustrates a further modification in a pump housing.

Fig. 7 is a horizontal sectional view taken on line 1-1 of Fig. 6; and

Fig. 8 is an end elevational view of the pump housing of Figs. 6 and '7.

Throughout the several views of the drawings similar reference characters are employed to denote the same or similar parts.

In the past, circulating pumps of the centrifugal type have been produced with the 'intakes and exhausts radially spaced from one another with respect to the axis of the impeller. By this construction the discharge pipe was located externally of the tank or machine tool with which the pump was employed andthis frequently resulted in an inconvenient arrangement of parts. By the present invention, the intake and exhaust are arranged at the same side or face of the pump housing and preferably through the mounting flange for the pump. Various modifications of this arrangement are illustrated in the drawings, to be later described in detail, and this arrangement may be such as to have the intake and exhaust ports co-axial and concentric with each other or laterally'spaced with respect to one another.

Specifically referring to the drawings and particularly to Fig. 1 thereof the numeral I 0 indicates a motor disposed above a pump indicated by the reference numeral II. The motor I0 and pump H are connected to one another by an extension or connecting housing l2. The motor l0 includes anupper housing l3 and lower housing l4 between which is the stator ring I5. The upper housing I3 is provided with a bearing seat 16 in which is seated the ball bearing ll. The lower housing is likewise provided with a bearing seat IS in which is seated a ball bearing [9.

Rotated on said ball bearings l1 and I9 is a shaft 20 which extends through the motor l0. connecting housing l2 and into the pump II. The shaft 20 has secured to it at a point within the stator ring the rotor 21' of the motor. Secured to the shaft 20 immediately beneath the bearing I1 is a fan 22 having a plurality of spaced.

blades 23. The flange of the fan above the blades 23 is formed into a cup shaped receptacle 24 and the said receptacle is utilized to prevent lubricant, supplied to the bearing I! through the oiling fixture 25, from contacting the motor rotor and stator parts. Any lubricant within the receptacle 24 is centrifugally ejected therefrom against the inner wall 26 of the dome end 21 of the motor housing 13. The lubricant flows through this housing to and through apertures 28 formed through the wall of the motor housing l3 at thebottom of the dome 21. To assist the out ward flow of the centrifugally dischar ed lubrithe upper end of the connecting housing I2. The

cant the lower walls of the aperture 28 extend inwardly towards the fan 22 as illustrated at 29. The inner end of the wall or shelf 29 turns upwardly to provide the lip 30 which is closely adjacent the periphery of the fan. The lip 30 and the shelf 29 in addition intercept any lubricant that would overflow this receptacle 24 and therefore again prevent this excess lubricant from engaging withthe motor parts.

The lower housing I4 is provided with an oiling duct 3I which terminates at its inner end at the bearing I9 and at its outer end has the oiling fixture 32. Beneath the bearing I9 the shaft 2e has secured to it a centrifugal throwout member or vane 33 which prevents mist or spray and the like, rising within the extension housing I2, from engaging the motor parts. This moisture and the like is intercepted by the centrifugal throwout member 33 and discharged through the ducts or ports 34 formed radially through the flange 35 at flange 35 is further provided with a plurality of apertures through each of which projects bolt 36 for connecting the said housing I2 to the motor housing I4. i

The lower end of the connecting housing I2 is provided with a radial flange 31 through which projects a plurality of bolts 38 for connecting the extension housing I2 to the pump I I. Projecting below the flange 31 the housing I2 has a sleevelike extension 39 open atone side as at 40. At the end of the sleeve 39 is a flange 4I having an enlarged central aperture 42. The flange 4| forms the upper side of the impeller chamber 43 formed within the pump housing.

The pump II includesa pump housing 64 having at its upper side a flange 45 to which the flange 31 of the extension housing is secured. Within the housing 44 is a pair of spaced webs 46 and 41 which, together with the flange 4|, completes the impeller chamber 43. The webs 45 and 41 terminate at one side of the housing in the discharge pipe 43. The base 49 of the pump housing and the flange 45 each terminate in an attaching flange 50 which is provided axially therethrough with an opening 5I.

As seen in Fig. 1 the discharge conduit or pipe 49 projects through the opening 5I'in the attaching flange 50 and provides passages entirely around the discharge conduit 48 to the interior of the pump housing 44. These passages 5I form supply ducts or ports for the enlarged aperture 42 in the flange H and the enlarged aperture 52 in the web 41 for supplying the impeller chamber 43 with liquid or fluid to be circulated by the pump.

The impeller chamber 3, see 3, is of the usual construction starting with substantially nothing as at the point 53 and gradually enlarging until the discharge conduit or pipe 48 is reached. Any suitable or desirable impeller may be utilized for circulating the liquid or fluid. As shown in the drawings the impeller illustrated comprises a hub 54 secured to a reduced portion 55 at the end of the shaft 20. Projecting radially from the center of the hub is a disc 56 having secured to its upper and lower surfaces respectivelyimpeller blades 51 and 58. The upper blades 51 of course receive liquid or fluid through the aperture 42 in the flange 4I while the blades 58 receive the liquid or fluid through the aperture 52 in the web 47.

From the foregoing it will now be appreciated that there has now been provided a pump housing in which the pump is supplied with fluid or liquid 50 as is usual construction. At the same time the pump is provided with a discharge conduit or pipe extending through the same mounting flange 50 instead of having this disohargeopening radially spaced from the intake opening as is usual construction and is illustrated in co-pending application, Serial No. 81,043which was filed on May 21, 1936. I

By the construction above referred to the pump, as a whole, may be secured by bolts or the like extending through openings 59 in the mounting flange 5I to a sump. tank or machine tool base in which the supply tank is formed and will receive the fluid, liquid or the like to be circulated through an aperture in the wall of the sump, tank or machine tool registering with the supply aperture 5! in the mounting flange 50, as illustrated for example in Fig. 4. Projecting into said sump, tank or machine tool base through the same opening therein is the discharge pipe or conduit 48 and to which the discharge pipe extension is connected. From this it will be seen particularly in the case of a machine tool structure, that the discharge pipe may be concealed within the machine tool or may even be formed integral therewith and connected with the discharge conduit 49. In this way the said discharge pipe for the circulating pump will be out of the way and will not interfere with control mechanisms or the like that are usually disposed externally of the machine tool.

In some cases it may be desirable to supply the pump from a second source other than the supply directly through the supply opening 5I in the mounting flange 50. Such a construction is illustrated in Figs. 4 and 5. As shown in these views the space or passage 60 between the web 41 and base 49 of the pump housing, which normally supplies the lower side of the impeller, terminates in a threaded aperture SI to which the supplementary supply pipe 62 is connected, while the discharge conduit or pipe is is vertically spaced with respect thereto. At the same time, the normal supply aperture 5| supplies the upper side of the pump impeller through ports around the discharge conduit or pipe 48'; By this construction, the lower side of the impeller may be supplied from a point, remote from the point of supply of the upper side of the impeller. As an example of the use to which this modified construction can be put, attention is specifically invited to. Fig. 4. In this set-up, use is made of a delivery pipe or. the like 63, which carries the fluid from the machine tool table to the sump or tank 64. Instead of allowing all of the fluid flow ing through said delivery pipe 63 to enter the tank 64, a certain proportion thereoi' is diverted, by the funnel shaped member 65, to the supply pipe 52, to the under side of the impeller; while the remainder of the fluid passes through apertures 66 in the funnel shaped member 65, to the sump or tank 64, and is supplied to the upper side-of the impeller, through the aperture or opening 5| in the mounting flange. By this construction also, a vacuum or suction is placed on the delivery pipe 63, thereby causing a more rapid emptying of this pipe and a quicker drainage of the fluid from the machine tool table. It should also be noted that, with this construction, the lower side of the pump may be supplied from a point below the pump by turning the supply pipe 52 to this lower point, and mount-ing a foot valve on said supply pipe to avoid the loss of pump priming.

A further modification of the pump housing, is illustrated in Figs. 6 to 8 inciusive. In these views, the intake and discharge ports are again arranged at the same side of the pump, but are laterally spaced from one another, instead of being vertically spaced, as in Figs. 4 and 5, or concentric with one another, as in Figs. 1 and 3. This is particularly illustrated in Fig. '7, in which the supply aperture 5|" supplies the upper and lower side of the impeller, and extends from one end of the mounting flange inwardly toward the center of the housing, while the discharge conduit or pipe 48" extends from the other end of the mounting flange, toward the center of the housmg. In this modification, and as seen in Fig. 6, the lower side of the impeller chamber 43, instead of being completed by the web 41, as in Figs. 1 and 4, is completed by a flarige 61, which is similar to the flange 4|, of the extension housing I2. The flange 61 is formed at the end of a sleeve 68 projecting from a closure plate 69. The closure plate 69 is provided with a plurality of apertures through which project bolts 10, which also enter a flange H, on the lower end of the housing, and which flange is similar to the flange 45, on the upper end thereof.

It should be noted, that the closure plate attaching bolts are identical with the bolts 38,

' utilized in securing the extension housing I! to the pump and, it should furtherbe noted, that the circumferential spacing of the bolts 10 and 38 are identical, whereby the housing may be turned end for end and the housing may be positioned to form a right or left hand pump, by merely changing, the position of the pump housing about the axis of the shaft 20. In other words, with the construction as illustrated in Figs. 6 to 8 inclusive, the pump may be readily made to take care of right or left hand delivery, by merely adjusting the parts and. in some cases by reversing the direction of rotation'of the motor rotor 2|.

It should also be noted, that the pump housing, illustrated in Figs. 1 and 4 may, instead of having web 41 for completing the impeller chamber and the base 49, be provided with the end closure plate 69.

It is believed, that the foregoing description fully discloses the invention, and provides a structure which will accomplish the advantages and objects initially set forth.

What is claimed is: v 1. In a circulating pump of the class described, a pump housing casting including an integral mounting flange forming the sole support for the pump and from whichprojects the encircling body portion of the housing, which in turn has integral therewith, and interiorly thereof, spaced flanges to form an impeller discharge passage, means associated with said casting, and in at least one instance removably secured thereto, in alignment with the impeller discharge passage flanges and outer edges of the encircling body portion for forming an impeller chamber and for closing the sides of the pump housing, an impeller within said impeller chamber, the impeller chamber sides having formed therethrough supply ports for supplying the interior of the impeller chamber and the impeller and said ports being in communication with an intake port formed through the mounting flange, and said impeller chamber discharge passage flanges beyond the impeller chamber being connected to form a dis charge pipe with its axis in the plane of rotation of the impeller and substantially coincident with the axis of the intake port and said discharge pipe passing through the intake port.

2. In a circulating pump of the class described, a pump housing casting including an integral mounting flange forming the sole support for the pump and from which projects the encircling body portion of the housing, which in turn has integral therewith, and interiorly thereof, spaced flanges to form an impeller discharge passage,

means associated with said casting, and in at least one instance removably secured thereto, in

alignment with the impeller discharge passage flanges and outer edges of the encircling body portion for forming an impeller-chamber and for closing the sides of the pump housing, an impeller within said impeller chamber, the impeller chamber sides having formed therethrough supply ports for supplying the interior of the impeller chamber and the'impeller and said ports being in communication with an intake port formed through the mounting flange, said impeller chamber discharge passage flanges beyond the impeller chamber being connected to form a discharge pipe with its axis in the plane of rotation of the impeller and substantially coincident with the axis of the intake port and said discharge pipe passing through the intake port, a driving shaft connected with the impeller and projecting from one side thereof, and driving means for said shaft supported by the aforesaid means which forms one q. 

